Shaft-bearing and lubricator therefor.



A. BROGHU.

SHAFT BEARING AND LUBRIUATOR THEREFOR.

APPLICATION FILED JUNE 22, 1911.

1,070,1 O9, Patented Aug. 12, 1913.

3 SHEETSSHEET 1.

A. BROGHU. SHAFT BEARING AND LUBRIGATOR THEREFOR APPLICATION FILEDJUNEZZ, 1911.

Patented Aug. 12, 1913.

3 SHEETS-SHEET 2.

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SHAFT BEARING AND LUBRICATOR THEREFOR. APPLICATION FILED JUNE 22, 1911.

Patented Aug. 12, 1913,

3 SHEETS SHEET 3.

Sum/who'll an eraras arana niaicn.

ARSINE BROCHU, OF FRANKLIN, NEW IIAMPSHIRE.

SHAFT-BEARING AND LUBRICATOR THEREFOR.

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' and Lubricators Therefor, of which the following is a specification.

This invention relates to shaft bearings and more particularly to shaftbearings of two cycle internal combustion engines.

The object of the invention is to provide abearing which willeffectively hold the compression in the crank case and which will supplythe proper amount of lubricant to the crank shaft and to the connectingrod.

Further objects of the invention will appear as the following specificdescription is read in connection with the accompanying drawing, whichforms a part of this application, and in which Figure 1 is a top planview of a crank case base with the bearing shown in section. Fig. 2 is aperspective view of one of the rings employed. Fig. 3 is a similar viewof the ring used where morethan one cylinder is used. Fig. 4 is aperspective view of the packing employed. Fig. 5 is a similar view ofthe clamping ring for the packing. Fig. 6 is a sectional view showing amodified form of packlng. Flg. 7 1s a sectlonal view through.

one of the lubricant wells of Fig. 1. Fig.8 is a section of modificationwith parts omitted. Fig. 9 is a perspective view of the type of packingringused on one side of the crank when two or more cylinders are used.

Referring more particularly to the drawing, 1 represents the lowerportion or base of a two cycle hydro-carbon engine crank case which isprovided with a crank space 2 communicating with lateral apertures orrecesses 3 in which the shaft. bearing 4 is mounted. The ordinary crankshaft 5 is journaled in the bearings and is provided with the usualcrank 6 for connecting the shaft with the pitman or connecting rod, notshown. On opposite sides of the crank space 2 the casing is. shown asprovided with lubricant wells 7 and 8 which communicate directly withthe shaft through the separation in the bearing members 4.

The inner bearing member upon one side of the lubricant well 8 isprovided with an oil channel 9'which communicates with a passage 10extending diagonally through the shaft 5 and communicating with asimilar Specification of Letters Patent.

Application filed June 22, 1911.

Patented Aug. 12,1913. Serial n 634,673.

passage 11 in the crank 6. The end of the passage 11 is enlarged, asshown at 12, and a valve ring 13 is mounted therein to prevent theescape and to limit the movement of a ball valve 14 which seats againstthe shoulder 15 formed by the enlargement of the channel or passage 11.The channel 9 communicates with the oil well or chamber 8 through a port16 formed in a packing ring 17 which surrounds the shaft between theseparate parts of the bearing 4 and abuts against the end of saidbearing and the end wall of the well 8. A similar ring 18 surrounds theshaft and is held in spaced relation with the other ring 17 and againstthe opposite end of the bearing 4 and the opposite end wall of the wellby a spiral spring 19 which. is arranged between the rings. Both ofthese rings are provided with annular inwardly extending flanges 20which are notched, as at 21, to receive the keys 22 for causing therings to rotate with the shaft, the keys entering slots 23 in the shaft.

Surrounding the flanges 20 and lying in between the same, is a splitpacking ring 24 which is T-shaped; in cross section. This packing ringis held in tight engagement with the shaft by means of a split springring 25.which constricts upon the packing ring and holds it firmly inengagement with the shaft at all times, irrespective of the wearthereof. Upon the opposite side of the crank .6 the space between theportions of the bearing 4 is filled in a like manner by packing rings 26and 27, both lying within the chamber 7 and the latter of which isprovided with a port 28 which communicates with a channel 29 formed inthe inner portion of the bearing. Both of said rings 26 and 27 areformed in separate parts held together by a set screw 9*, as shown inFig. 9, so that where more than one cylinder is used the packing may beremoved without disconnecting the entire shaft or removing both or allof the cylinders. I

In the modification shown in Fig. 6, the packing rings are shown assupplied with inwardly extending pins 30 which enter the ends of spiralsprings 31 bridged between the rings and adapted to hold them in separated relation. The shaft is shown as provided with a slot 32 in which asingle key 33 is secured, said key extending across the packing andseating in slots 34 inthe rings. In this instance the packing is causedto rotate with the rings and shaft while, in the preferred form, it isnot positively connected to either part but does not have the slotneceseiry tor the reception of the key, thus making less chance torleakage.

It will be noticed that the packing ring and the packing rings 17 and 18and 26 and 27 effectually prevent the escape of any gas in the crankcase. At the up stroke of the piston the suction in the crank case willcause a certain amount of oil to be drawn from the chamber 8 through theports 9, 10 and 11, past the valve 14, thus keeping the connecting rodproperly lubricated. Upon the down stroke of the piston thevpressure inthe case willcause the valve 14 to seat against the shoulder 15 andprevent the oil in the channel 11 from being forced back into thechamber 8. At the time in which the well is in register with the channel9 the suction and pressure is only momentary and therefore only a smallquantity of oil passes the valve at each stroke and, if the valve doesnot work perfectly, only a small portion in. the channel 11 is forcedback into the oil well.

The outer ends of the bearings 4 are also grooved, as shown at 85,'andthe outside rings 18 and 26 are provided with channels 37 which registerwith the groove at certain times and which are supplied withpredetermined quantities of lubricant. These channels are out ofregister with the grooves when compression is in the case.

As shown inilfiig. 7, the top of the casing 40 has connected to it thehead 41 havingv a port 42 therein which is connected to the sight glass43 by a checking gland 44. A. similar arrangement is connected to thelower half of the casing'showing the head 45 having the port 46 and thepacking gland 47.

In the modified form shown in Fig. 8, the top portion 40 of the casinghas secured therein,-beyond the well, an adjusting screw 48 which bearsupon a. packing plate 49 and holds the same against the shatt 5. Theadjusting screw 48. is held in position .by a clamp nut 50. Upon theopposite side of the well a recess 51 is formed in the upper part of thecasing and seated therein. is a packing segment 52 forced intoengagement with the shaft 5 by means of a spring 53. This packing ringprevents oil from leaking beyond the crank channel 54 into the crankcasing.

Having thus described the invention, what I claim as new is 1. In anengine, the combination with a crank case having an oil well, of abearing member mounted in the case on opposite sides of the well, acrank shaft journaled in the bearing and passing through the well, saidcrank shaft having an oil passage, packing rings surrounding the shaftand lying within and against the walls of the oil well, and meanscomprising in part a plurality of ports in the rings for forming acommunication between the oil well and the oil passage at eachrevolution of the shaft.

2. In an engine, the combination with a crankcase having an oil well,bearing members mounted in the case on opposite sides of the well, acrank shaft jonrnaled in the bearing members, said crank shaft having anoil passage, packing rings surrounding the shaft, between the bearingmembers and lying in the oil well, oil ports in said rings, means forholding said packing rings against the Walls of the well, and means inthe bearing members coacting with the ports in the packing rings forforming communi cation between the oil passage and oilwell atpredetermined intervals.

3. lln an engine, the combination with a crank case having an oil welltherein, of a bearing mounted in said crank case, a crank shaftjournaled in the bearing, and oiling passage therein for the connectingrod adapted to communicate with the well, and

means rotating with the shaft for connecting the oil well and the oilingpassage in one position of the crank shaft only.

4. in a two-cycle internal combustion en- 1 gine, the combination with acrank case, of

a bearing therein, a shaft journaled in the bearings and having an oilpassage extending through the crank thereof, a valve operating in thepassage said crank case having an oil well therein, a port extendingthrough the bearing and communicating with the passage in the crank ateach rotation of the shaft and at or upon the suction stroke of theengine, and means for connecting the well with the port when said portis in communication with the passage.

5. In a two cycle internal combustion engine, the combination with acrank case having an oil well therein, of bearing members mounted in thecrank case, a crank shaft journ'aled in the bearing members and passingthrough the oil well, packing rings surrounding the shaft and lying inthe oil well, said packing rings having ports connecting the well andbearing, means for holding the packing rings against the walls or theoil chamber and against the ends of the bearing members, a packingarranged between the'rings and in engagement with the shaft, and aspring surrounding the packing for taking up wear in the same.

6. In a two cycle internal combustion engine, the combination with acrank case having an oil well therein, of bearing members mounted in thecrank case, a crank shaft journaled in the bearing members andpassmembers, a packing arranged between the rings and in engagement withthe shaft, and a spring for taking up wear in the packing, together withmeans for causing the rotation of the rings with the shaft.

7. In an engine, the combination with a crank case having a welltherein, of a bear ing member mounted in the casing on opposite sides ofthe well, a crank shaft journaled in the bearing member and passingthrough the well, channeled packing rings surrounding the shaft andlying within the well against the walls thereof, means forming acommunication between the oil well and the shaft at each revolution ofthe shaft, and packing devices carried by the casing on opposite sidesof the well.

8. In an engine, the combination with a crank casing having an oil well,of a bearing mounted in the casing on opposite sides of the well, acrank shaft journaled in the bearing and extending through the well,channeled packing rings surrounding the shaft and lying within the wellagainst the walls thereof, means forming a communication between the oilwells and the shaft at each revolution of the shaft, and sight glassesconnected to the casing and having communication with the well.

In testimony whereof I affix mysignature 30 Witnesses:

THOMAS F. CLIFFORD, AGNES L. GAHAGAN.

